Island



UNIT-ED STATES PATENT OFFICE.

`IRA E. PEOK, OE PROVIDENCE, RI-IODE ISLAND.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 402,186, dated April 30, 1889.

Application filed December 17, 1888. Serial No. 293,907. (No model.)

` .To all whom t may concern'.-

within which the projecting end of the operating-screw is sleeved. This construction is very objectionable, in that, in addition to its excessive cost, very little service wears away the screwthreads, and so renders the device comparatively inoperative, because the limits within which the actuating-lever cam operates are so small that it is impossible to compensate for the lost motion occasionedby sald wear. Furthermore, a special construction of ferrule is needed, and the trouble and expense of boring and threading the socket in which the supplementary screw operates are so great as to forbid its application to wrenches already made. My device obviates these dif- "ficulties and affords a construction at once simple, cheap, and effective, and readily applied to wrenches in use.

Referring to the accompanying drawings, Figure 1 is a side view of the wrench provided with my improvement, the jaws Of the wrench being closed vupon a nut. Fig. 2 represents a cross-section taken in the line c: of Fig. l. Fig. 3 represents a'section Of the ferrule and tightening-lever, taken in the line y of Fig. l. y

In the accompanying drawings, A is the handle of the wrench; B, the ferrule; C, the stationary jaw; D, the shank; E, the movable jaw, and F the Operating-screw, which is provided with the milled collar g for turning the screw in order to operate the movable jaw.

The screw F is provided with the bearing-v stem a, the said bearing-stem fitting and being held in the bearing-socket b of the ferrule, as usual in this class of wrenches. The forward face, c, of the ferrule B is a plane slightly inclined to a plane at right angles to the axis I of the handle, and the end 7i of the tighteninglever G is made in wedge form, as shown in Fig. 3, so that when the lever G is carried up against the side of the shank D of the wrench the screw F and movable jaw E will be thrown forward toward the nut I. rlhe bearing-stem a passes loosely through the perforation d in the lever G and into the socket b, and the forward face, e, of the wedge portion h of the lever G is made to bear against the side f of the milled collar g.

In Operating with the wrench the lever G is to be first turned away fromthe shank D to the position shown by the broken lines in Fig. 2, and thej aws of the wrench then brought against the sides of the nut by means of the lingers operating upon the milled collar g of the screw F, to revolve the same. Then by bringing the lever G back to the position at the side of the shank D, as shown by the full lines, the screw F and jaw E will be pressed' forward in a powerful manner, to tightly grip the nut I between the jaws C and E.

My improvement, as above described, can' be readily applied to the screw-wrenches in common use by simply ling an inclined face upon the ferrule, so as to provide forthe action of the wedge-lever G between the face c of the ferrule B and the side f of the milled collar g of the screw, and when so applied it will be efficient and durable.

I claim as my invention In combination, the stationary jaw C, movable jaw E, the ferrule B, provided with the v socket b, and the flat inclined face c, the operating-screw F, having a milled collar, g, and bearing-stem a., which enters the socket b, and the lever G, provided with a perforation, d, to receive the stem a, and with opposite .iiat surfaces inclined to form a wedge which -by partial rotation upon the stem @will serve to produce the desired powerful forward movement of the jaw E, substantially as described.

IRA F. PECK.

lVitnesses:

JOHN S. LYNOII, SOCRATES SOHOLEIELD. 

